factory wholesale simple b5 loose spiral notebook a4 thickened loose-leaf notebook student removable blank grid notebook

minimalist pure black minimalist pure white minimalist transparent minimalist gray

a5-pure shell-no refill b5-pure shell-no refill a4-pure shell-no refill a5 [60 horizontal lines] 120 pages a5 [60 grids] 120 pages a5 [60 blank sheets] 120 pages b5 [60 horizontal lines] 120 pages b5 [60 grids] 120 pages b5 [60 blank sheets] 120 pages a4 [60 horizontal lines] 120 pages a4 [60 grid sheets] 120 pages a4 [60 blank sheets] 120 pages b5 [80 horizontal lines] 160 pages b5 [80 grids] 160 pages b5 [blank 80 sheets] 160 pages